Blockchain Engineer (Remote) - job 1 of 2

As a Blockchain Engineer at Token Metrics, you will be responsible for designing, implementing, testing, and deploying Ethereum Virtual Machine (EVM) smart contracts. Your work will also involve collaborating with external auditors to ensure the security and safety of the smart contracts you create. Additionally, you will take engineering projects from concept to production, working closely with engineering leaders and the product team to establish effective project roadmaps.

To qualify for the Blockchain Engineer role at Token Metrics, you should have at least 3 years of professional software engineering experience or equivalent blockchain development experience. A strong proficiency in developing in Solidity and familiarity with precompiles are essential. Candidates should also understand software engineering practices, particularly regarding smart contract security. Experience working with dapps and web3 is a significant plus.

For the Smart Contract Engineer position at Token Metrics, proficiency in Solidity is crucial, as this is the primary language used for developing smart contracts on the Ethereum blockchain. Additionally, a solid understanding of software engineering best practices, specifically those related to security and smart contract development, is essential for ensuring safe deployments and interactions with decentralized applications (dapps).

At Token Metrics, we prioritize the continuous growth and development of our Blockchain Engineers. We provide access to resources that enhance your technical skills, promote collaboration among engineers for knowledge-sharing, and encourage participation in relevant workshops and conferences. These opportunities allow our engineers to stay current with the fast-paced world of blockchain technology.

Token Metrics fosters a collaborative and inclusive culture where Blockchain Engineers are encouraged to innovate and share ideas. Our remote working environment allows for flexibility while promoting teamwork across diverse backgrounds. We value open communication, support professional development, and celebrate the contributions of each team member, creating a vibrant and engaging workplace.

When preparing for an interview at Token Metrics, it’s essential to understand the differences between ERC-20 and ERC-721 token standards. ERC-20 is a standard for fungible tokens, meaning each token is identical and can be exchanged on a one-to-one basis, such as cryptocurrencies. In contrast, ERC-721 defines non-fungible tokens (NFTs), where each token is unique and cannot be exchanged on a like-for-like basis. This distinction is vital in smart contract development and token economics.

In an interview for the Smart Contract Engineer role at Token Metrics, discuss your approach to ensuring smart contract security. This may include implementing best practices such as thorough testing, utilizing established security tools and frameworks, conducting peer code reviews, and collaborating with external auditors. Emphasizing a proactive attitude towards security can demonstrate your commitment to delivering safe, reliable smart contracts.

When asked about prior blockchain projects, provide a clear and concise overview of your role, the project's goals, and your specific contributions, especially in the context of Solidity smart contract development. Highlight any challenges you faced and how you overcame them, as well as the impact your work had on the project's success. Doing so showcases your experience and problem-solving skills.

To effectively answer this question, describe your systematic troubleshooting process, which could include analyzing transaction logs, using debugging tools, and reviewing the code for potential flaws. Talk about the importance of testing scenarios in a pre-production environment and how you would communicate with the team when issues arise. This approach demonstrates your practicality as a Blockchain Engineer.

Discuss your familiarity with various tools and technologies relevant to smart contract development, such as Remix for coding and testing, Truffle Suite for development and deployment, and Infura for interacting with the Ethereum network. Highlighting your proficiency with these tools at an interview will show your readiness and capability for the Smart Contract Engineer role at Token Metrics.

When preparing for your interview, ensure you can explain gas—it’s a fundamental concept in Ethereum. Gas is the unit that measures the amount of computational effort required to execute operations on the network, which can vary based on complexity. Demonstrating your understanding of how gas fees work and their impact on transactions will be crucial for delivering smart contracts efficiently.

For this interview question, mention best practices such as avoiding complex constructs, minimizing state variables, using upgradable proxies, and thoroughly documenting your code. Sharing an example from your past experience where you successfully adhered to these practices while ensuring security can reflect your attention to detail and expertise.

In your response, detail your strategy for staying informed about blockchain trends, such as following reputable tech blogs, participating in online communities, attending webinars, and keeping up with developments from organizations like Ethereum Foundation. Mention any specific resources, such as online courses or newsletters, that you find particularly helpful.

Discuss potential challenges like network congestion, interoperability issues, and the complexities of maintaining decentralization while enhancing scalability. By articulating these challenges and sharing how you might address them through innovative solutions or technology, you will demonstrate your critical thinking skills relevant to the Blockchain Engineer position.

Being equipped to discuss your experience with cross-chain technology is important for the Smart Contract Engineer role. Share any projects where you developed or utilized cross-chain bridges, the specific technologies you employed, and the challenges faced. This showcases your technical knowledge and adaptability in a rapidly evolving landscape.